The Pied-billed Grebe is a waterbird that can be seen year around swimming along the Arboretum waterway and "sinking" under water to escape predators and search for food. The stripe along its bill is a very distinctive characteristic of this species, but disappears at certain times of year. Their silhouette is always the same.

Pied-billed grebes are rarely seen on land or flying overhead. They build floating nests out of sticks and are fiercely territorial. When nesting, a pied-billed grebe will not hesitate to chase the much larger Canada goose away from its floating nest.